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Write a blog post discussing the current trends in AI.

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AI technologies have become increasingly popular in recent years, with applications ranging from big data analysis to natural language processing (NLP). This article will discuss four of the most significant current trends in AI – machine learning, robots and cognitive computing, autonomous systems, and personal assistant AI. 
Machine learning is a field of computer science that focuses on developing systems that can learn from data and information, “teaching” them to recognize patterns, make predictions and decisions, and adapt their behavior. Robots and cognitive computing systems are AI-driven technologies that allow for the development of intelligent automation. While robotics are well-known in the marketplace, cognitive computing is a recent area of research and development, utilizing AI and cognitive sciences to create powerful algorithms that can understand large amounts of data. Autonomous systems, such as self-driving cars, are making use of AI technologies to enable advanced technologies such as facial recognition and natural language processing. Personal assistant AI has seen widespread adoption in the past few years, with assistants such as Siri, Alexa, and Cortana offering voice-based interactions and becoming increasingly more sophisticated.